The ET131 can be used to record the conductivity of a solution flowing through tubing. It is fully factory-configurable to meet the customer’s defined applications. The customer should specify the desired conductivity range, tubing dimensions and the nature of the experiment. Typical conductivity ranges can be chosen from 20 µS/cm to 200 mS/cm Full scale.

The following parameters can be specified to suit an application:

The outer diameter of the tubing: between 360 µm and 3200 µm.

Inner diameters: between 50 µm and 1600 µm.

Electrode gap: 3 or 10 mm. Select a large gap to measure high conductivities or a small gap for better resolution.

Installation is easy as the customer’s tubing is simply slid into the headstage. The ET131 must be connected to either the ER225, ER815 or ER825 hardware units.

The sample doesn't come into contact with the detector electrodes so it's easy to analyse hazardous, corrosive or radioactive liquids. There is no carryover or memory effect from the previous sample. There is no electrode deterioration or polarization.

The ET131 applications include:

Recording the very low conductivity of polar ice meltwater by Continuous Flow Analysis.

Measuring liquid-liquid slug flow properties in tubing.

Measuring total dissolved inorganic carbon concentration at different depths in the sea with an autonomous ocean profiling vehicle.